SU858952A1

SU858952A1 - Drum type screen

Info

Publication number: SU858952A1
Application number: SU782661425A
Authority: SU
Inventors: Василий Фадеевич Бердяев; Галина Михайловна Степанова; Людмила Филипповна Фоминых
Original assignee: Всесоюзный государственный научно-исследовательский и проектный институт асбестовой промышленности
Priority date: 1978-07-07
Filing date: 1978-07-07
Publication date: 1981-08-30

Description

(54) БАРАБАННЫЙ . ГРОХОТ(54) DRUM. BOLT

II

Изобретение относитс к технике грохочени С:ыпучих материалов и может быть использовано в асбестовой промьшшенности дл обеспыливани и классификации концентратов асбеста.The invention relates to the screening technique C: bulking materials and can be used in asbestos industry for the dedusting and classification of asbestos concentrates.

Известен барабанный грохот, включающий кожух с загрузочным и разгрузочными механизмами и ситовый барабан, внутри которого расположен ротор с бичами l .Known drum screen, including the casing with loading and unloading mechanisms and sieve drum, inside of which is a rotor with whips l.

Недостатком известной конструкции вл етс то, что обрабатьшаемый продукт концентрируетс только в нижней части барабана, где он, захватываемый бичами ротора, поднимаетс на некоторую высоту и снова падает вниз на слой продукта, .т.е. просеивание происходит только-на нижней части ситового барабана и не дает возможсноти увеличить производительность за счет неполного использовани ситовой поверхности. Увеличение . же производительности за счет увеличени скорости транспортировани A disadvantage of the known construction is that the product to be processed is concentrated only in the lower part of the drum, where it, captured by the rotor whips, rises to a certain height and falls down again onto the product bed, i.e. Screening occurs only at the bottom of the screen drum and does not allow for increased productivity due to incomplete use of the screen surface. Increase. same performance by increasing the speed of transportation

.продукта внутри барабана сокращает врем пребьшани продукта в ситовом барабане, в св зи с чем снижаетс и эффективность грохочени . Кроме того, концентраци основной массы продукта в нижней части ситового барабана создает неуравновешенные массы и ударные нагрузки на ротор, что снижает в целом надежность машины . Высокий слой продукта в нижней The product inside the drum shortens the residence time of the product in the sieve drum, thereby reducing the efficiency of screening. In addition, the concentration of the main mass of the product in the lower part of the sieve drum creates unbalanced masses and shock loads on the rotor, which reduces the overall reliability of the machine. High product layer at the bottom

10 части барабана создает дополнительное сопротивление вращению ротора,10 parts of the drum creates additional resistance to the rotation of the rotor,

что в конечном итоге, увеличивает :энергоемкость машины.which ultimately increases: the energy intensity of the machine.

ISIS

Claims

Closest to the proposed technical entity is a drum screen, including a sieve drum, inside which is a rotor with blades and bores, a casing with loading and unloading devices and a pneumatic system. Solid blades emanate from the axis of rotation. 2. A disadvantage of the known construction is that; The trees are formed by radial blades emanating from the axis of rotation. They form a gutter with an angle of 90, with the result that the product captured by the whips falls into the central part of the gutter, from which it enters the sieve surface of the drum only after passing the corresponding blades of the horizontal axis, i.e. when one of the gutter walls has a negative angle to the horizontal. Thus, on the top of the screen drum, the circumference zone with an angle of 140-160 during screening does not occur. In addition, the radial blades do not form in the central part of the hollow space, necessary for the suction of the pulverulent fraction. The purpose of the invention is to increase the productivity and efficiency of screening. This goal is achieved by the fact that in a drum screen, including a sieve drum, inside of which is a rotor with blades and rows of scourges, a casing with loading, and unloading devices and a pneumatic system, the blades are made of two adjacent plates with a sharp angle. blades are interconnected and form an internal cavity. In addition, the plates are perforated, and the internal cavity communicates with the pneumatic system. FIG. 1 shows a drum screen, a general view; in fig. 2 shows section A-A in FIG. 1. The screen contains a casing 1 with loading 2 and unloading devices 3 and 4, respectively, to cut the joint and nadecene products, a sieve drum 5, a rotor 6 with rows of scourges 7, between which blades are installed, made in the form of plates 8, connected at an acute angle, the length of which corresponds to the rotor length. The plates of 8 adjacent blades are interconnected and form an internal cavity 9, which communicates with the pneumatic system 10. The plates 8 can be perforated. The drum screen works as follows. The product enters through the loading device 2 of the casing 1 of the inner sieve drum 5, where the whips 7 of the rotor 6 are captured and transported over the surface of the strainer of the drum 5. When this happens, the bulk of the product captured by the whips 7 does not fall into the lower part of the drum 6 and spreads between the plates 8. Further, as the rotor 6 rotates and the plates 8 pass through the top point of the drum 5, the product rolls onto a sieve. Thus, only the upper, small part of the drum does not participate in the screening. After the transition of the top point of the drum 5, due to the gable shape of the grooves formed by the plates 8, one of their walls forms an inclined surface and the product easily slides out of the groove to the sieve surface of the drum 5, plugging in an additional sieve surface. Making the plates 8 perforated allows the fine fraction (dust) to be removed by air flow. The length of the plates is commensurate with the length of the rotor. Such an embodiment of the blades of the ban screen rods allows to increase productivity due to the use of a larger sieve drum surface, increase the reliability of the screen by eliminating the shock loads of the rotor on the screening product, as well as reduce energy consumption by reducing the rotational resistance of the rotor. Claims I. A drum screen comprising a screen drum, inside which is a rotor with blades and rows of scourges, a casing with loading and unloading devices and a pneumatic system, characterized in that, in order to increase productivity and screen efficiency, the blades are made of two plates connected at an acute angle, while the plates of adjacent blades are interconnected and form an internal cavity. 2. Screen according to claim 1, characterized in that the plates are perforated and the internal cavity communicates with the pneumatic system. sources of information taken into account in the examination 1. Extraction and enrichment of asbestos ores. Scientific works. Issue 5, M., Nedra, 1965, p. 33-55.

2. USSR author's certificate number 667256, cl. B 07 B 1/18, 1975.